package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Employee;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.GetMapping;

import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        log.info("保存菜品:{}", dishDTO);
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        // 向菜单表中添加一条
        dishMapper.insert(dish);

        // 获取菜品id
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        // 向菜品口味表中添加多条(批量插入)
        if(flavors != null && flavors.size() > 0){
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishId);
            }
            dishFlavorMapper.insertDishFlavor(flavors);
        }
    }


    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Transactional
    public void deleteBatch(List<Long> ids) {
        // 判断当前菜品是否能删除--是否存在起售中的菜品
        for(Long id: ids){
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus().equals(StatusConstant.ENABLE)){
                // 当前菜品处于起售中,不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        // 判断当前菜品是否能删除--是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdByDishIds(ids);
        if(setmealIds != null && setmealIds.size() > 0){
            // 当前那菜品被套餐关联了
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        // 删除菜品表中的菜品数据
        dishMapper.deleteByIds(ids);
        // 删除菜品关联的口味数据
        dishFlavorMapper.deleteByDishIds(ids);
    }

    public DishVO getById(Long id) {
        Dish dish = dishMapper.getById(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        List<DishFlavor> flavors = dishFlavorMapper.getByDishId(id);
        dishVO.setFlavors(flavors);
        return dishVO;
    }

    @Override
    public void update(DishDTO dishDTO) {
        log.info("修改菜品:{}", dishDTO);
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);

        // 删除原来的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        // 添加新的口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishDTO.getId());
            }
            dishFlavorMapper.insertDishFlavor(flavors);
        }
    }
}
